Guest:  Yalda Mousavinia;  Topics:  Space Decentral.net, Space Cooperative, blockchain space development, Open Source, cryptocurrency usage, collaborative networks for space and more. 

Guests:  Brent Sherwood, Dr. Scott Howe, Dr. Ted Hall; Topics: Variable artificial gravity research on proposed Gateway (was known as LOP-G), design issues for rotating habitat, & the need for the human gravity RX for BLEO & more. 

Guest: Michael Ciancone; Topics" Mike's new book "Foreword to Spaceflight" plus the IAC upcoming congress and their plans for 2019, NASA, science fiction, education and more.

Guest:  Al Globus; Topics:  Al's new book "The High Frontier: An Easier Way," eLEO low radiation orbits, centrifuge spin rates for humans, life support, commercial markets and more.  Note that Al's co-author, Tom Marotta, call in on the toll free line in both the first and second segment to participate and add to our discussion.

Guest:  Dr. Gil Levin;  Topics: Martian life detection experiments, Independent Mars review panel, Viking Labeled Release experiment, NASA Mars life detection politics and more.  Please direct all comments and questions regarding specific Space Show programs & guest(s) to the Space Show blog which is part of archived program on our website, www.thespaceshow.com.   Comments and questions should be relevant to the specific Space Show program.